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SINGAPORE (AP) - Singapore businessman Dan Tan has been re-arrested just a week after being released following more than two years in detention on suspicion of coordinating a global soccer match-fixing syndicate.

Singapore police said Wednesday that 51-year-old Tan, also known as Tan Seet Eng, was arrested late Tuesday for “involvement in criminal activities.” He was previously released from jail last Wednesday when the country’s highest court ruled he was being held unlawfully.

“The police confirmed that they have arrested Dan Tan on Dec. 1 for investigations into suspected involvement in criminal activities. Investigations are ongoing,” the police statement said.

Hamidul Haq, one of Tan’s Lawyers, told The Associated Press he was yet to learn of the specific charges relating to the new arrest.

“We are still finding out what the next steps are,” Haq told The Associated Press. “We will want to try to see him to take instructions. I don’t know if the police will allow that.”

Singapore Home Affairs and Law Minister, Kasiviswanathan Shanmugam, told a media conference that investigations into Tan “are ongoing.”

“A decision will be made - one way or another - on what is to be done with him,” Shanmugam said.

Tan was jailed in 2013 after Italian prosecutors accused him of being the mastermind of a global crime syndicate that made millions of dollars betting on rigged Italian matches and other games across the world.

He was held under a law that allows for indefinite detention without trial if it’s in the interest of public safety, but the Singapore Court of Appeal on Nov. 25 ruled that public safety was not at risk and ordered Tan’s release.

“We will be advised by the AGC (Attorney General’s Chambers), who will look at the judgment and make sure that any new detention order - if such a detention order is issued - sets out the grounds adequately, fully, in compliance with the Act,” Shanmugam said.

Tan’s release triggered outrage from leading members of international sporting associations, and Italian prosecutor Roberto Di Martino, who was leading an inquiry into international match-fixing and referred to Tan as the “general director of the ring.”

Tan was suspected of being the mastermind behind dozens of fixed matches in Italy’s top three divisions and leading a fixing ring stretching as far as South America that was allegedly in operation for more than 10 years.

He is also being tried in absentia by a Hungarian court for allegedly manipulating 32 games in Hungary, Italy and Finland.